package test;

public class _06_StringConcat {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3, 4, 5};
        String str = arrToString(arr);
        System.out.println(str);
    }

    //作用：把一个数组变成字符串
    public static String arrToString(int[] arr) {
        String s = "";
        s = s + "[";
        for (int i = 0; i < arr.length; i++) {
           if(i == arr.length - 1){
               s = s + arr[i];
           }else{
               s = s + arr[i] + ", ";
           }
        }
        s = s + "]";

        return s;
    }

}
